Centrifugally-operated brake.



W. & A. L. SPEER.

CENTRIFUGALLY OPERATED BRAKE.

APPLICATION FILED 0CT.Z. 1909. 1 1 62,41 1 Patented Nov. 30, 1915.

2 SHEETSSHEET 2.

H 4 17 o G I 17 W I l8 WITNESSES I wmw //VVEN 702 7715/11 HTTORNEJ/ Igear 55.

one direction, to prevent sudden shocksor jars in operation; second, toprovide an improved means of controlling; a lowering mechanism, andthird, the providing of a hoisting and lowering mechanism, with suitableoperating mechanism and control.

We attain these objects bythe mechanism illustrated in the accompanyingdrawings in which Figure 1 is a front view of the entire ap-fplianceinstalled; Fig. 2 is a view taken at right angles to that shown in Fig.1; Fig. 3 is an enlarged view partly in section of the automatic dumbwaiter; Fig. 1 is an enlarged view of the dumb waiter head shown in Fig.1 and having the hub of the driving pulley exposed in order to show thereleasing mechanism; Fig. 5 is a face view showing the governor weightsin place; Fig. 6 is an enlarged view of the governor plate; Fig. 7 is aview of the governor plate taken at right angles to that shown in Fig.6; and

Fig. 8 is an enlarged View of the governor weights.

Similar numerals refer to similarthroughout the several views.

1 is the casing.

2 is the main driving shaft.

3 is the main' gear keyed to the main shaft 2.

4 is the first intermediate gear meshing with the main gear and keyed tointermediate shaft 2 1.

5 is the second intermediate gear keyed to intermediate shaft 24 andmeshes with and drives governor gear 6. Governor gear 6 runs loose onmain shaft 2 is integral with sleeve 20 and drives or is retarded by.brake parts 7 is the brake gear running idle on brake shaft 8 andmeshing with governor gear 6.

Specification of Letters Patent. I Application filed catcher 2, 190a.

sra'rss P T NT mos.

f WILLIAM srnsa eivn ARTH R Lows s rens, or BALTIMORE, MARYLAND.

Patented Nov. 30, 1915.

Serial 170.520,?56.

8v is the brake shaft operating through casing 1 with a longitudinal butnot a rotary movement one end of which is formed into a head 9 whichhead 9 upon the longitudinal movement of brake shaft 8 clamps brake gear7 between said head 9 and casing 1 thus braking the same.

10 is an inclined collar secured by means of pin 11 or otherwise securedto brake shaft 8.

12 is the brake incline operating free on brake shaft 8 and againstincline collar 10. To brake incline 12 is securedbrake lever 13 at theend of which is eye 1% to which is attached the brake rope'32, e

16 is the hoisting pulley secured to main driving shaft 2 and over whichoperates hoisting cable .30.

17 is a leather disk secured to governor plate18. 1

18 is the governor plate having integral therewith inclines l9.

20 is a sleeve secured to governor gear 6 flat on one side and whichoperates loose on main shaft 2 and over which operates gov ernor plate18 and to which it is rotatively secured. I

21 are studs secured into sleeve 20 and upon which operates governorweights 23.

22 are springs tending to keep governor weights 23 closed or in normalposition.

23 are governor weights which operate on studs 21 and inclines 19 thusbraking main driving gear 3 and governor gear 6.

24 is the intermediate shaft upon which are secured intermediate gears4t and 5.

25 is the driving pulley automatically secured to intermediate shaft 24:and over which operates hand rope 31.

27 are graduated rollers. 28 is a tapered recess formed in drivingpulley 25 and in which work graduated rollers 27.

26 is a collar keyed to intermediate shaft 29 is a spring tending tokeep graduated rollers 27 engaged.

30 is the hoisting cable.

31 is the hand rope.

32 is the brake rope.

33 is the car.

The operation of our invention is as fol lows-Having installed the dumbwaiter in the usual manner, we use the hand rope to hoist the car. Whenthe car is at the proper landing the brake is applied by hand and instopping the dumb waiter, shock which.

might be caused by the suddenstopping of a long rope and pulleys runnmgat high speed is prevented by means of the automatic attachment ofdriving pulley 25 to intermediate shaft 2 L 7 Having thus described ourinvention what we claim and desire to secure by Letters Patent isv V 1;The combination with a pulley, of a rotatable and longitudinally movablebrake for controlling the movement of said pulley, means actuated by thespeed of movement of said pulley for automatically throwing said brakeinto operation, a gearing mechanism operating said pulley, a powermechanism applied to said gearing mechanism, automatic means ofattaching said power mechanism to said gearing mechanism whereby thepower mechanismhas a loose movement in one direction of operation fromthe gearing mechanism.

'2. The combination with a pulley, of a brake for controlling themovement of said pulley, means actuated by the speed of movement of saidpulley for automatically throwing said brake into operation, a gearingmechanism operating said pulley, a power mechanism applied to saidgearing mechanism, automatic means of attaching said power mechanism tosaid gearing mechanism whereby the power mechanism has a loose movementin one direction of operation from the gearing mechanism.

3. In a dumb waiter, a driving shaft, a

driven shaft, positively operative mechanism connecting said two shafts,a governor brake operating to control the speed of one of said partsconsisting of, a pair of rotating parts provided with means ofautomatically braking said parts upon the increase of speed of one ofsaid parts, the said two parts being positively geared to operate atdifferent speeds.

&. In a dumb waiter, a driving shaft, a driven shaft, positivelyoperative mechanism connecting said two shafts, a governor brakeoperating to control the speed of one of said parts oonsistingof, a pairof rotating parts provided with means of automatically bra-king saidparts upon the increase of speed of one of said parts, the said twoparts being positively geared to operate at different speeds andpositively operative mechanism between said brake and the one of saidshafts.

WILLIAM SPEER.

ARTHUR LOUIS SPEER.

YVitnesses ROBERT WILDE, Anonin C. FLEAGLE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, D. G.

